Which ion has 56 protons 54 electrons 78 neutrons?
Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. The chemical symbol for Barium is Ba. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal.
What isotope has 55 protons and 78 neutrons?
Caesium as 55 protons and 78 neutrons in its nucleus giving it an Atomic Number of 55 and an atomic mass of 133. An atom of Caesium has only 1 electron in its outer shell.
What element has 53 protons 78 neutrons?
Iodine
Iodine is element number 53. Iodine has 53 protons and 53 electrons (because it has no charge the number of protons equals the number of electrons). Iodine-131 has 131 protons and neutrons. Iodine-131 has 131 minus 53 protons = 78 neutrons.
What isotope has 54 protons and 78 neutrons?
An isotope with 54 protons and 78 neutrons has an atomic number of 54 and a mass number of 54+78=132. Look up the atomic number on the periodic table to find the element xenon, with elemental symbol, Xe.
What is the mass number of an atom of barium that has 56 protons 56 electrons and 74 neutrons *?
The element which contains 56 protons is the element barium. A barium isotope with 74 neutrons, is barium-130.
Is Helium 3 an isotope of hydrogen 3?
Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons. Helium-3 was discovered in 1939….Helium-3.
| General | |
|---|---|
| Half-life | stable |
| Parent isotopes | 3H (beta decay of tritium) |
| Isotope mass | 3.0160293 u |
| Spin | 1⁄2 |
What element has the atomic number of 78?
element platinum
The element platinum is a metal. It has an atomic number of 78. It also has an atomic mass of 195.08.
What iodine has 76 neutrons?
Iodine-129
| General | |
|---|---|
| Names | iodine-129, I-129 |
| Protons | 53 |
| Neutrons | 76 |
| Nuclide data |
What is 12C in chemistry?
Atomic mass is based on a relative scale and the mass of 12C (carbon twelve) is defined as 12 amu; so, this is an exact number. Each carbon atom has the same number of protons and electrons, 6. 12C has 6 neutrons, 13C has 7 neutrons, and 14C has 8 neutrons and so on.
What is the mass number for an atom of barium containing 56 protons and 18 neutrons?
The atomic number is 56. Examination of a periodic table shows that the element with an atomic number of 56 is barium, Ba. The mass number is the sum of the protons and neutrons. A = 56 + 82 = 138 The charge of the species is obtained by examination of the number of protons and electrons.
What is the mass number of 56 protons and 82 neutrons?
What is the mass number of an atom of barium containing 56 protons and 82 neutrons? Examination of a periodic table shows that the element with an atomic number of 56 is barium, Ba. The mass number is the sum of the protons and neutrons.
How many protons and electrons does helium have?
Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. The chemical symbol for Helium is He. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements.
What is the chemical symbol for helium?
The chemical symbol for Helium is He. Mass numbers of typical isotopes of Helium are 3; 4. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A.
What is the mass number of an isotope of helium?
Neutron Number and Mass Number of Helium Mass numbers of typical isotopes of Helium are 3; 4. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A.
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